There is much talk about the crypto-mania.
But some central banks do create money to sell it on international markets.
Actually it's not very different than a Bitcoin miner selling BTC's...
Here is a concrete case with the Swiss Franc (CHF) with a chart 2009 - now (end 2017).
https://gautiersblog.blogspot.ch/2017/12/bitcoin-and-swiss-franc-manias.htmlNot really sure what is scarier...